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+/**
+ * Copyright (c) 2016 - 2021, Nordic Semiconductor ASA
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ *
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include "sdk_common.h"
+#if NRF_MODULE_ENABLED(NRF_LOG) && NRF_MODULE_ENABLED(NRF_LOG_BACKEND_UART)
+#include "nrf_log_backend_uart.h"
+#include "nrf_log_backend_serial.h"
+#include "nrf_log_internal.h"
+#include "nrf_drv_uart.h"
+#include "app_error.h"
+
+nrf_drv_uart_t m_uart = NRF_DRV_UART_INSTANCE(0);
+
+static uint8_t m_string_buff[NRF_LOG_BACKEND_UART_TEMP_BUFFER_SIZE];
+static volatile bool m_xfer_done;
+static bool m_async_mode;
+static void uart_evt_handler(nrf_drv_uart_event_t * p_event, void * p_context)
+{
+    m_xfer_done = true;
+}
+
+static void uart_init(bool async_mode)
+{
+    nrf_drv_uart_config_t config = NRF_DRV_UART_DEFAULT_CONFIG;
+    config.pseltxd  = NRF_LOG_BACKEND_UART_TX_PIN;
+    config.pselrxd  = NRF_UART_PSEL_DISCONNECTED;
+    config.pselcts  = NRF_UART_PSEL_DISCONNECTED;
+    config.pselrts  = NRF_UART_PSEL_DISCONNECTED;
+    config.baudrate = (nrf_uart_baudrate_t)NRF_LOG_BACKEND_UART_BAUDRATE;
+    ret_code_t err_code = nrf_drv_uart_init(&m_uart, &config, async_mode ? uart_evt_handler : NULL);
+    APP_ERROR_CHECK(err_code);
+
+    m_async_mode = async_mode;
+}
+
+void nrf_log_backend_uart_init(void)
+{
+    bool async_mode = NRF_LOG_DEFERRED ? true : false;
+    uart_init(async_mode);
+}
+
+static void serial_tx(void const * p_context, char const * p_buffer, size_t len)
+{
+    uint8_t len8 = (uint8_t)(len & 0x000000FF);
+    m_xfer_done = false;
+    ret_code_t err_code = nrf_drv_uart_tx(&m_uart, (uint8_t *)p_buffer, len8);
+    APP_ERROR_CHECK(err_code);
+    /* wait for completion since buffer is reused*/
+    while (m_async_mode && (m_xfer_done == false))
+    {
+
+    }
+
+}
+
+static void nrf_log_backend_uart_put(nrf_log_backend_t const * p_backend,
+                                     nrf_log_entry_t * p_msg)
+{
+    nrf_log_backend_serial_put(p_backend, p_msg, m_string_buff,
+                               NRF_LOG_BACKEND_UART_TEMP_BUFFER_SIZE, serial_tx);
+}
+
+static void nrf_log_backend_uart_flush(nrf_log_backend_t const * p_backend)
+{
+
+}
+
+static void nrf_log_backend_uart_panic_set(nrf_log_backend_t const * p_backend)
+{
+    nrf_drv_uart_uninit(&m_uart);
+
+    uart_init(false);
+}
+
+const nrf_log_backend_api_t nrf_log_backend_uart_api = {
+        .put       = nrf_log_backend_uart_put,
+        .flush     = nrf_log_backend_uart_flush,
+        .panic_set = nrf_log_backend_uart_panic_set,
+};
+#endif //NRF_MODULE_ENABLED(NRF_LOG) && NRF_MODULE_ENABLED(NRF_LOG_BACKEND_UART)